其根茎

In this text, we researched some quantit y properties of clone reproduction organ of several main rhizomatous grasses .The results

本文以我国北方草原上几种重要的根茎禾草为研究对象，对其地下的无性繁殖器官的一些特性进

Leymus chinensis steppe is one of the unique types of rhizomatous steppe that appeares in middle-Asia. In recent years, plant functional groups have been became a new research focus.

羊草草原是亚洲中部草原特有的一类根茎禾草草原，对其在放牧条件下的草地的研究有助于认识典型草原的整体状况，具有普遍意义。

Ginger oleoresin was extracted from Zingiber officinale Rosc.var. Laiwudajiang by the technique of supercritical fluid extraction.

用超临界CO2萃取生姜根茎中的姜油树脂，并用气相色谱-质谱联用技术对其进行了成分分析。

β-elemene extracted from Zingiberaceae of Curcuma wenyujin firstly in China can be used as anticancer drug. For its low toxicity, high effectiveness and wide-spectrum,β-elemene can prevent the recurrence of superficial bladder cancer.

β-榄香烯是中国首先从姜科植物温郁金的根茎中提取的抗癌有效成分，由于其低毒、高效和广谱等优点，因此，在预防浅表膀胱肿瘤复发方面有显著的效果。

4The low similarities betweenseed banks and the established vegetation were considered to be the consequences ofthe frequent presence in the established vegetation but not in seed banks of someperennial rhizomatous plants which mainly depended on vegetative propagation toregenerate;insignificant difference in the species composition of seed barks amongtransects, might be accounted for by the fact that the flood drift had functioned as adisseminator for propagules;and with the intensifying of the flooding disturbance,both species diversity and the similarity between seed banks and establishedvegetations declined.

4种子库与地上植被相似性普遍较低，其原因是主要靠营养繁殖以更新种群的多年生根茎植物经常在植被中出现而不在种子库中出现；受水淹干扰的样带之间种子库的种类组成差异不大，说明洪水漂移行使了繁殖体传播和散布的功能；随水淹干扰强度增加，种子库物种多样性指数减小，种子库与地上植被的物种组成相似性下降。

On the other hand, the more important thing is because the urban housing is a kind of heterogeneity products.

另一方面，更重要的是由于城市住房是一种异质性产品。

Climate histogram is the fall that collects place measure calm value, cent serves as cross axle for a few equal interval, the area that the frequency that the value appears according to place is accumulated and becomes will be determined inside each interval, discharge the graph that rise with post, also be called histogram.

气候直方图是将所收集的降水量测定值，分为几个相等的区间作为横轴，并将各区间内所测定值依所出现的次数累积而成的面积，用柱子排起来的图形，也叫做柱状图。